231525532 has 24 divisors (see below), whose sum is σ = 467641440. Its totient is φ = 98241600.

The previous prime is 231525529. The next prime is 231525551. The reversal of 231525532 is 235525132.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 231525532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38107 + ... + 43762.

It is an arithmetic number, because the mean of its divisors is an integer number (19485060).

Almost surely, 2^231525532 is an apocalyptic number.

It is an amenable number.

231525532 is an abundant number, since it is smaller than the sum of its proper divisors (236115908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231525532 is a wasteful number, since it uses less digits than its factorization.

231525532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81981 (or 81979 counting only the distinct ones).

The product of its digits is 9000, while the sum is 28.

The square root of 231525532 is about 15215.9630651497. The cubic root of 231525532 is about 614.0441953425.

The spelling of 231525532 in words is "two hundred thirty-one million, five hundred twenty-five thousand, five hundred thirty-two".